Will this fit the V6 also? Beside trimming rear dust shield, will there be any other mods needed to make fit? Price seems great considering I see used Brembos going for similar prices.

something to keep in mind is the master cylinder. the SS and ZL1 master cylinders are the same, but the V6 is different
if you put front 6 piston calipers on a V6 car. it will need a lot more fluid than the stock calipers.
you also need to keep in mind that the brake bias will be changed quite a bit if you only swap the fronts. the car may or may not stop very well, especially in a panic stop.